Combine flour and salt in large bowl; cut in butter with pastry blender or fork until mixture resembles coarse crumbs. Stir in enough water with fork just until flour is moistened.
Roll out dough on lightly floured surface into 12-inch circle. Fold into quarters. Place dough into ungreased 9-inch pie pan; unfold dough, pressing firmly against bottom and sides. Trim crust to ½ inch from edge of pan. Crimp or flute edge. Set aside.
